On vehicles equipped with an electronic engine management system, as was said, 7 sensors are installed that characterize the operation of the engine. The control controller has a built-in diagnostic system that determines the presence and nature of malfunctions and signals the driver about them by turning on the CHECK ENGINE warning lamp located in the instrument cluster. Turning on the lamp while driving does not mean that the engine must be immediately turned off, but indicates the need to check the engine at a service station. When individual sensors fail, the controller uses emergency modes, ensuring close-to-normal vehicle operation. As a rule, in this case, the dynamic characteristics of the engine worsen, fuel consumption increases. And only in the event of a failure of the crankshaft position sensor, the engine stops and does not start. The same happens with the destruction of the damper. If the performance of the crankshaft position sensor can only be determined using diagnostic equipment, then the state of the damper can be determined visually by scrolling the engine with a starter. In the event of a breakdown, the damper will wag on the crankshaft, the alternator belt may fall off.
The most common sensor defect is the failure of the throttle position sensor. At the same time, the idle speed of the engine seems to hang and does not reset. This defect must be eliminated as soon as possible, since, in addition to increasing fuel consumption, it can lead to an emergency stop on the road. Therefore, it is better to carry it with you.
For the operation of VAZ cars of the family «tenths» models, the factory recommends the use of unleaded gasoline. This is because most vehicles have an oxygen concentration sensor that does not tolerate lead. Since the driver cannot determine the quality of the fueled gasoline, candles can help him in this. By the state of carbon deposits on the central electrode of the candle, you can determine what kind of gasoline your car was filled with. If the soot is sandy in color, then unleaded gasoline, if the soot is red, get ready to replace the spark plugs and the oxygen concentration sensor.
By family car «tenth» release models until May 2000, there was a defect - a break in the output shaft (gearboxes). This was due to the fact that the secondary shaft was made a groove under the retaining ring, which held the entire set of gears. With a sharp change in engine speed, the load on twisting increased, which led to a break. To date, the design of the secondary shaft has been changed, this has made the gearbox more durable.
Chassis defects are directly related to the condition of the roads on which the car is operated, and the style of driving on these roads. Incorrect choice of driving modes leads to accelerated wear of such chassis elements as front struts, rear shock absorbers, ball bearing pins, tie rod ends. It is also necessary to monitor the adjustment of the steering rack.
When starting the engine, pay attention to the behavior of the ignition key. With a long time to start the engine, it is possible to burn the contacts of the ignition switch, which leads to biting the key in the position «starter». In this case, the starter drive gear does not return to its original position, but begins to rotate along with the flywheel, which leads to the combustion of the starter brushes and an open circuit in the armature winding.
Family cars «tenth» models are equipped with an automatic heating and ventilation control system, which allows you to maintain a favorable climate in the car. The most common defect is the failure of the heater control controller when only cold or only hot air blows. In this case, it is necessary to replace the controller.
Suspension malfunctions
If the car sways while driving, and especially when cornering, if there are bumps, it does not want to steer, and if smudges on the struts are still visible, then the front shock absorbers must be changed. Shock absorbers are working hard, the condition of our roads makes them work like that.
When you press the hood of the car, a dull knock is heard in the shock absorbers, or these knocks are heard when the car moves over large irregularities - most likely the rubber damper strut has failed.
If the sound is sharper, then these are signs of wear on the support bearing: if the assistant shakes the car, then, holding the standard racks with your hand, you can feel these knocks.
The steering can also knock, but its knock will appear when driving over small bumps. When moving the steering rod up and down by hand, it should not move; if it moves, then the clearance in the gear-rack engagement is increased.
With a sharp rotation of the steering wheel by an assistant to the left and right, dull knocks are heard, and holding the joint with your hands, you can feel the play in the steering joint.